名詞 espionage:

1. the systematic use of spies to get military or political secrets

1. He was caught in the very act of espionage.
   他正在干間諜活動時被抓住了。
2. Marked by melodramatic intrigue and often espionage.
   間諜的，驚險的以戲劇性的陰謀為特征的，常常指間諜活動
3. The episode could reasonably serve as a unique epic of royal espionage!
   這一事件理所當然地堪稱是國王間諜活動的的獨一無二的史詩。

es.pi.o.nage

n.（名詞）
The act or practice of spying or of using spies to obtain secret information, as about another government or a business competitor.
間諜行為：密探或使用間諜去得到一個政府或商業(yè)競爭者的秘密信息

來源：
French espionnage
法語 espionnage
from espionner [to spy]
源自 espionner [偵探，密探]
from Old French espion [spy]
源自 古法語 espion [間諜]
from Old Italian spione [of Germanic origin] * see spek-
源自 古意大利語 spione [源于日耳曼的] *參見 spek-